2 * ahci.c - AHCI SATA support
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2004-2005 Red Hat, Inc.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
29 * AHCI hardware documentation:
30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/blkdev.h>
40 #include <linux/delay.h>
41 #include <linux/interrupt.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/device.h>
44 #include <scsi/scsi_host.h>
45 #include <scsi/scsi_cmnd.h>
46 #include <linux/libata.h>
48 #define DRV_NAME "ahci"
49 #define DRV_VERSION "2.3"
55 AHCI_MAX_SG = 168, /* hardware max is 64K */
56 AHCI_DMA_BOUNDARY = 0xffffffff,
57 AHCI_USE_CLUSTERING = 1,
60 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
62 AHCI_CMD_TBL_CDB = 0x40,
63 AHCI_CMD_TBL_HDR_SZ = 0x80,
64 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
65 AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
66 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
68 AHCI_IRQ_ON_SG = (1 << 31),
69 AHCI_CMD_ATAPI = (1 << 5),
70 AHCI_CMD_WRITE = (1 << 6),
71 AHCI_CMD_PREFETCH = (1 << 7),
72 AHCI_CMD_RESET = (1 << 8),
73 AHCI_CMD_CLR_BUSY = (1 << 10),
75 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
76 RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
77 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
81 board_ahci_vt8251 = 2,
82 board_ahci_ign_iferr = 3,
86 /* global controller registers */
87 HOST_CAP = 0x00, /* host capabilities */
88 HOST_CTL = 0x04, /* global host control */
89 HOST_IRQ_STAT = 0x08, /* interrupt status */
90 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
91 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
94 HOST_RESET = (1 << 0), /* reset controller; self-clear */
95 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
96 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
99 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
100 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
101 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
102 HOST_CAP_SNTF = (1 << 29), /* SNotification register */
103 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
104 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
106 /* registers for each SATA port */
107 PORT_LST_ADDR = 0x00, /* command list DMA addr */
108 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
109 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
110 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
111 PORT_IRQ_STAT = 0x10, /* interrupt status */
112 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
113 PORT_CMD = 0x18, /* port command */
114 PORT_TFDATA = 0x20, /* taskfile data */
115 PORT_SIG = 0x24, /* device TF signature */
116 PORT_CMD_ISSUE = 0x38, /* command issue */
117 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
118 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
119 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
120 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
121 PORT_SCR_NTF = 0x3c, /* SATA phy register: SNotification */
123 /* PORT_IRQ_{STAT,MASK} bits */
124 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
125 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
126 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
127 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
128 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
129 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
130 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
131 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
133 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
134 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
135 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
136 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
137 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
138 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
139 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
140 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
141 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
143 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
148 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
150 PORT_IRQ_HBUS_DATA_ERR,
151 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
152 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
153 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
156 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
157 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
158 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
159 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
160 PORT_CMD_CLO = (1 << 3), /* Command list override */
161 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
162 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
163 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
165 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
166 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
167 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
168 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
171 AHCI_FLAG_NO_NCQ = (1 << 24),
172 AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */
173 AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */
174 AHCI_FLAG_IGN_SERR_INTERNAL = (1 << 27), /* ignore SERR_INTERNAL */
175 AHCI_FLAG_32BIT_ONLY = (1 << 28), /* force 32bit */
176 AHCI_FLAG_MV_PATA = (1 << 29), /* PATA port */
177 AHCI_FLAG_NO_MSI = (1 << 30), /* no PCI MSI */
179 AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
180 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
181 ATA_FLAG_SKIP_D2H_BSY |
185 struct ahci_cmd_hdr {
200 struct ahci_host_priv {
201 u32 cap; /* cap to use */
202 u32 port_map; /* port map to use */
203 u32 saved_cap; /* saved initial cap */
204 u32 saved_port_map; /* saved initial port_map */
207 struct ahci_port_priv {
208 struct ahci_cmd_hdr *cmd_slot;
209 dma_addr_t cmd_slot_dma;
211 dma_addr_t cmd_tbl_dma;
213 dma_addr_t rx_fis_dma;
214 /* for NCQ spurious interrupt analysis */
215 unsigned int ncq_saw_d2h:1;
216 unsigned int ncq_saw_dmas:1;
217 unsigned int ncq_saw_sdb:1;
220 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
221 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
222 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
223 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
224 static void ahci_irq_clear(struct ata_port *ap);
225 static int ahci_port_start(struct ata_port *ap);
226 static void ahci_port_stop(struct ata_port *ap);
227 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
228 static void ahci_qc_prep(struct ata_queued_cmd *qc);
229 static u8 ahci_check_status(struct ata_port *ap);
230 static void ahci_freeze(struct ata_port *ap);
231 static void ahci_thaw(struct ata_port *ap);
232 static void ahci_error_handler(struct ata_port *ap);
233 static void ahci_vt8251_error_handler(struct ata_port *ap);
234 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
235 static int ahci_port_resume(struct ata_port *ap);
236 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl);
237 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
240 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
241 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
242 static int ahci_pci_device_resume(struct pci_dev *pdev);
245 static struct scsi_host_template ahci_sht = {
246 .module = THIS_MODULE,
248 .ioctl = ata_scsi_ioctl,
249 .queuecommand = ata_scsi_queuecmd,
250 .change_queue_depth = ata_scsi_change_queue_depth,
251 .can_queue = AHCI_MAX_CMDS - 1,
252 .this_id = ATA_SHT_THIS_ID,
253 .sg_tablesize = AHCI_MAX_SG,
254 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
255 .emulated = ATA_SHT_EMULATED,
256 .use_clustering = AHCI_USE_CLUSTERING,
257 .proc_name = DRV_NAME,
258 .dma_boundary = AHCI_DMA_BOUNDARY,
259 .slave_configure = ata_scsi_slave_config,
260 .slave_destroy = ata_scsi_slave_destroy,
261 .bios_param = ata_std_bios_param,
264 static const struct ata_port_operations ahci_ops = {
265 .port_disable = ata_port_disable,
267 .check_status = ahci_check_status,
268 .check_altstatus = ahci_check_status,
269 .dev_select = ata_noop_dev_select,
271 .tf_read = ahci_tf_read,
273 .qc_prep = ahci_qc_prep,
274 .qc_issue = ahci_qc_issue,
276 .irq_clear = ahci_irq_clear,
277 .irq_on = ata_dummy_irq_on,
278 .irq_ack = ata_dummy_irq_ack,
280 .scr_read = ahci_scr_read,
281 .scr_write = ahci_scr_write,
283 .freeze = ahci_freeze,
286 .error_handler = ahci_error_handler,
287 .post_internal_cmd = ahci_post_internal_cmd,
290 .port_suspend = ahci_port_suspend,
291 .port_resume = ahci_port_resume,
294 .port_start = ahci_port_start,
295 .port_stop = ahci_port_stop,
298 static const struct ata_port_operations ahci_vt8251_ops = {
299 .port_disable = ata_port_disable,
301 .check_status = ahci_check_status,
302 .check_altstatus = ahci_check_status,
303 .dev_select = ata_noop_dev_select,
305 .tf_read = ahci_tf_read,
307 .qc_prep = ahci_qc_prep,
308 .qc_issue = ahci_qc_issue,
310 .irq_clear = ahci_irq_clear,
311 .irq_on = ata_dummy_irq_on,
312 .irq_ack = ata_dummy_irq_ack,
314 .scr_read = ahci_scr_read,
315 .scr_write = ahci_scr_write,
317 .freeze = ahci_freeze,
320 .error_handler = ahci_vt8251_error_handler,
321 .post_internal_cmd = ahci_post_internal_cmd,
324 .port_suspend = ahci_port_suspend,
325 .port_resume = ahci_port_resume,
328 .port_start = ahci_port_start,
329 .port_stop = ahci_port_stop,
332 static const struct ata_port_info ahci_port_info[] = {
335 .flags = AHCI_FLAG_COMMON,
336 .pio_mask = 0x1f, /* pio0-4 */
337 .udma_mask = ATA_UDMA6,
338 .port_ops = &ahci_ops,
342 .flags = AHCI_FLAG_COMMON | AHCI_FLAG_HONOR_PI,
343 .pio_mask = 0x1f, /* pio0-4 */
344 .udma_mask = ATA_UDMA6,
345 .port_ops = &ahci_ops,
347 /* board_ahci_vt8251 */
349 .flags = AHCI_FLAG_COMMON | ATA_FLAG_HRST_TO_RESUME |
351 .pio_mask = 0x1f, /* pio0-4 */
352 .udma_mask = ATA_UDMA6,
353 .port_ops = &ahci_vt8251_ops,
355 /* board_ahci_ign_iferr */
357 .flags = AHCI_FLAG_COMMON | AHCI_FLAG_IGN_IRQ_IF_ERR,
358 .pio_mask = 0x1f, /* pio0-4 */
359 .udma_mask = ATA_UDMA6,
360 .port_ops = &ahci_ops,
362 /* board_ahci_sb600 */
364 .flags = AHCI_FLAG_COMMON |
365 AHCI_FLAG_IGN_SERR_INTERNAL |
366 AHCI_FLAG_32BIT_ONLY,
367 .pio_mask = 0x1f, /* pio0-4 */
368 .udma_mask = ATA_UDMA6,
369 .port_ops = &ahci_ops,
374 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
375 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
376 ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_HONOR_PI |
377 AHCI_FLAG_NO_NCQ | AHCI_FLAG_NO_MSI |
379 .pio_mask = 0x1f, /* pio0-4 */
380 .udma_mask = ATA_UDMA6,
381 .port_ops = &ahci_ops,
385 static const struct pci_device_id ahci_pci_tbl[] = {
387 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
388 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
389 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
390 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
391 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
392 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
393 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
394 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
395 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
396 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
397 { PCI_VDEVICE(INTEL, 0x2821), board_ahci_pi }, /* ICH8 */
398 { PCI_VDEVICE(INTEL, 0x2822), board_ahci_pi }, /* ICH8 */
399 { PCI_VDEVICE(INTEL, 0x2824), board_ahci_pi }, /* ICH8 */
400 { PCI_VDEVICE(INTEL, 0x2829), board_ahci_pi }, /* ICH8M */
401 { PCI_VDEVICE(INTEL, 0x282a), board_ahci_pi }, /* ICH8M */
402 { PCI_VDEVICE(INTEL, 0x2922), board_ahci_pi }, /* ICH9 */
403 { PCI_VDEVICE(INTEL, 0x2923), board_ahci_pi }, /* ICH9 */
404 { PCI_VDEVICE(INTEL, 0x2924), board_ahci_pi }, /* ICH9 */
405 { PCI_VDEVICE(INTEL, 0x2925), board_ahci_pi }, /* ICH9 */
406 { PCI_VDEVICE(INTEL, 0x2927), board_ahci_pi }, /* ICH9 */
407 { PCI_VDEVICE(INTEL, 0x2929), board_ahci_pi }, /* ICH9M */
408 { PCI_VDEVICE(INTEL, 0x292a), board_ahci_pi }, /* ICH9M */
409 { PCI_VDEVICE(INTEL, 0x292b), board_ahci_pi }, /* ICH9M */
410 { PCI_VDEVICE(INTEL, 0x292c), board_ahci_pi }, /* ICH9M */
411 { PCI_VDEVICE(INTEL, 0x292f), board_ahci_pi }, /* ICH9M */
412 { PCI_VDEVICE(INTEL, 0x294d), board_ahci_pi }, /* ICH9 */
413 { PCI_VDEVICE(INTEL, 0x294e), board_ahci_pi }, /* ICH9M */
415 /* JMicron 360/1/3/5/6, match class to avoid IDE function */
416 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
417 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
420 { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
421 { PCI_VDEVICE(ATI, 0x4390), board_ahci_sb600 }, /* ATI SB700 */
424 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
425 { PCI_VDEVICE(VIA, 0x6287), board_ahci_vt8251 }, /* VIA VT8251 */
428 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
429 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
430 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
431 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
432 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
433 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
434 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
435 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
436 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
437 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
438 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
439 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
440 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
441 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
442 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
443 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
444 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
445 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
446 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
447 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
448 { PCI_VDEVICE(NVIDIA, 0x07f0), board_ahci }, /* MCP73 */
449 { PCI_VDEVICE(NVIDIA, 0x07f1), board_ahci }, /* MCP73 */
450 { PCI_VDEVICE(NVIDIA, 0x07f2), board_ahci }, /* MCP73 */
451 { PCI_VDEVICE(NVIDIA, 0x07f3), board_ahci }, /* MCP73 */
452 { PCI_VDEVICE(NVIDIA, 0x07f4), board_ahci }, /* MCP73 */
453 { PCI_VDEVICE(NVIDIA, 0x07f5), board_ahci }, /* MCP73 */
454 { PCI_VDEVICE(NVIDIA, 0x07f6), board_ahci }, /* MCP73 */
455 { PCI_VDEVICE(NVIDIA, 0x07f7), board_ahci }, /* MCP73 */
456 { PCI_VDEVICE(NVIDIA, 0x07f8), board_ahci }, /* MCP73 */
457 { PCI_VDEVICE(NVIDIA, 0x07f9), board_ahci }, /* MCP73 */
458 { PCI_VDEVICE(NVIDIA, 0x07fa), board_ahci }, /* MCP73 */
459 { PCI_VDEVICE(NVIDIA, 0x07fb), board_ahci }, /* MCP73 */
460 { PCI_VDEVICE(NVIDIA, 0x0ad0), board_ahci }, /* MCP77 */
461 { PCI_VDEVICE(NVIDIA, 0x0ad1), board_ahci }, /* MCP77 */
462 { PCI_VDEVICE(NVIDIA, 0x0ad2), board_ahci }, /* MCP77 */
463 { PCI_VDEVICE(NVIDIA, 0x0ad3), board_ahci }, /* MCP77 */
464 { PCI_VDEVICE(NVIDIA, 0x0ad4), board_ahci }, /* MCP77 */
465 { PCI_VDEVICE(NVIDIA, 0x0ad5), board_ahci }, /* MCP77 */
466 { PCI_VDEVICE(NVIDIA, 0x0ad6), board_ahci }, /* MCP77 */
467 { PCI_VDEVICE(NVIDIA, 0x0ad7), board_ahci }, /* MCP77 */
468 { PCI_VDEVICE(NVIDIA, 0x0ad8), board_ahci }, /* MCP77 */
469 { PCI_VDEVICE(NVIDIA, 0x0ad9), board_ahci }, /* MCP77 */
470 { PCI_VDEVICE(NVIDIA, 0x0ada), board_ahci }, /* MCP77 */
471 { PCI_VDEVICE(NVIDIA, 0x0adb), board_ahci }, /* MCP77 */
474 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
475 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
476 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
479 { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */
481 /* Generic, PCI class code for AHCI */
482 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
483 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
485 { } /* terminate list */
489 static struct pci_driver ahci_pci_driver = {
491 .id_table = ahci_pci_tbl,
492 .probe = ahci_init_one,
493 .remove = ata_pci_remove_one,
495 .suspend = ahci_pci_device_suspend,
496 .resume = ahci_pci_device_resume,
501 static inline int ahci_nr_ports(u32 cap)
503 return (cap & 0x1f) + 1;
506 static inline void __iomem *__ahci_port_base(struct ata_host *host,
507 unsigned int port_no)
509 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
511 return mmio + 0x100 + (port_no * 0x80);
514 static inline void __iomem *ahci_port_base(struct ata_port *ap)
516 return __ahci_port_base(ap->host, ap->port_no);
520 * ahci_save_initial_config - Save and fixup initial config values
521 * @pdev: target PCI device
522 * @pi: associated ATA port info
523 * @hpriv: host private area to store config values
525 * Some registers containing configuration info might be setup by
526 * BIOS and might be cleared on reset. This function saves the
527 * initial values of those registers into @hpriv such that they
528 * can be restored after controller reset.
530 * If inconsistent, config values are fixed up by this function.
535 static void ahci_save_initial_config(struct pci_dev *pdev,
536 const struct ata_port_info *pi,
537 struct ahci_host_priv *hpriv)
539 void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
543 /* Values prefixed with saved_ are written back to host after
544 * reset. Values without are used for driver operation.
546 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
547 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
549 /* some chips have errata preventing 64bit use */
550 if ((cap & HOST_CAP_64) && (pi->flags & AHCI_FLAG_32BIT_ONLY)) {
551 dev_printk(KERN_INFO, &pdev->dev,
552 "controller can't do 64bit DMA, forcing 32bit\n");
556 if ((cap & HOST_CAP_NCQ) && (pi->flags & AHCI_FLAG_NO_NCQ)) {
557 dev_printk(KERN_INFO, &pdev->dev,
558 "controller can't do NCQ, turning off CAP_NCQ\n");
559 cap &= ~HOST_CAP_NCQ;
562 /* fixup zero port_map */
564 port_map = (1 << ahci_nr_ports(cap)) - 1;
565 dev_printk(KERN_WARNING, &pdev->dev,
566 "PORTS_IMPL is zero, forcing 0x%x\n", port_map);
568 /* write the fixed up value to the PI register */
569 hpriv->saved_port_map = port_map;
573 * Temporary Marvell 6145 hack: PATA port presence
574 * is asserted through the standard AHCI port
575 * presence register, as bit 4 (counting from 0)
577 if (pi->flags & AHCI_FLAG_MV_PATA) {
578 dev_printk(KERN_ERR, &pdev->dev,
579 "MV_AHCI HACK: port_map %x -> %x\n",
581 hpriv->port_map & 0xf);
586 /* cross check port_map and cap.n_ports */
587 if (pi->flags & AHCI_FLAG_HONOR_PI) {
588 u32 tmp_port_map = port_map;
589 int n_ports = ahci_nr_ports(cap);
591 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
592 if (tmp_port_map & (1 << i)) {
594 tmp_port_map &= ~(1 << i);
598 /* Whine if inconsistent. No need to update cap.
599 * port_map is used to determine number of ports.
601 if (n_ports || tmp_port_map)
602 dev_printk(KERN_WARNING, &pdev->dev,
603 "nr_ports (%u) and implemented port map "
604 "(0x%x) don't match\n",
605 ahci_nr_ports(cap), port_map);
607 /* fabricate port_map from cap.nr_ports */
608 port_map = (1 << ahci_nr_ports(cap)) - 1;
611 /* record values to use during operation */
613 hpriv->port_map = port_map;
617 * ahci_restore_initial_config - Restore initial config
618 * @host: target ATA host
620 * Restore initial config stored by ahci_save_initial_config().
625 static void ahci_restore_initial_config(struct ata_host *host)
627 struct ahci_host_priv *hpriv = host->private_data;
628 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
630 writel(hpriv->saved_cap, mmio + HOST_CAP);
631 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
632 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
635 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
637 static const int offset[] = {
638 [SCR_STATUS] = PORT_SCR_STAT,
639 [SCR_CONTROL] = PORT_SCR_CTL,
640 [SCR_ERROR] = PORT_SCR_ERR,
641 [SCR_ACTIVE] = PORT_SCR_ACT,
642 [SCR_NOTIFICATION] = PORT_SCR_NTF,
644 struct ahci_host_priv *hpriv = ap->host->private_data;
646 if (sc_reg < ARRAY_SIZE(offset) &&
647 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
648 return offset[sc_reg];
652 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
654 void __iomem *port_mmio = ahci_port_base(ap);
655 int offset = ahci_scr_offset(ap, sc_reg);
658 *val = readl(port_mmio + offset);
664 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
666 void __iomem *port_mmio = ahci_port_base(ap);
667 int offset = ahci_scr_offset(ap, sc_reg);
670 writel(val, port_mmio + offset);
676 static void ahci_start_engine(struct ata_port *ap)
678 void __iomem *port_mmio = ahci_port_base(ap);
682 tmp = readl(port_mmio + PORT_CMD);
683 tmp |= PORT_CMD_START;
684 writel(tmp, port_mmio + PORT_CMD);
685 readl(port_mmio + PORT_CMD); /* flush */
688 static int ahci_stop_engine(struct ata_port *ap)
690 void __iomem *port_mmio = ahci_port_base(ap);
693 tmp = readl(port_mmio + PORT_CMD);
695 /* check if the HBA is idle */
696 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
699 /* setting HBA to idle */
700 tmp &= ~PORT_CMD_START;
701 writel(tmp, port_mmio + PORT_CMD);
703 /* wait for engine to stop. This could be as long as 500 msec */
704 tmp = ata_wait_register(port_mmio + PORT_CMD,
705 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
706 if (tmp & PORT_CMD_LIST_ON)
712 static void ahci_start_fis_rx(struct ata_port *ap)
714 void __iomem *port_mmio = ahci_port_base(ap);
715 struct ahci_host_priv *hpriv = ap->host->private_data;
716 struct ahci_port_priv *pp = ap->private_data;
719 /* set FIS registers */
720 if (hpriv->cap & HOST_CAP_64)
721 writel((pp->cmd_slot_dma >> 16) >> 16,
722 port_mmio + PORT_LST_ADDR_HI);
723 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
725 if (hpriv->cap & HOST_CAP_64)
726 writel((pp->rx_fis_dma >> 16) >> 16,
727 port_mmio + PORT_FIS_ADDR_HI);
728 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
730 /* enable FIS reception */
731 tmp = readl(port_mmio + PORT_CMD);
732 tmp |= PORT_CMD_FIS_RX;
733 writel(tmp, port_mmio + PORT_CMD);
736 readl(port_mmio + PORT_CMD);
739 static int ahci_stop_fis_rx(struct ata_port *ap)
741 void __iomem *port_mmio = ahci_port_base(ap);
744 /* disable FIS reception */
745 tmp = readl(port_mmio + PORT_CMD);
746 tmp &= ~PORT_CMD_FIS_RX;
747 writel(tmp, port_mmio + PORT_CMD);
749 /* wait for completion, spec says 500ms, give it 1000 */
750 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
751 PORT_CMD_FIS_ON, 10, 1000);
752 if (tmp & PORT_CMD_FIS_ON)
758 static void ahci_power_up(struct ata_port *ap)
760 struct ahci_host_priv *hpriv = ap->host->private_data;
761 void __iomem *port_mmio = ahci_port_base(ap);
764 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
767 if (hpriv->cap & HOST_CAP_SSS) {
768 cmd |= PORT_CMD_SPIN_UP;
769 writel(cmd, port_mmio + PORT_CMD);
773 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
777 static void ahci_power_down(struct ata_port *ap)
779 struct ahci_host_priv *hpriv = ap->host->private_data;
780 void __iomem *port_mmio = ahci_port_base(ap);
783 if (!(hpriv->cap & HOST_CAP_SSS))
786 /* put device into listen mode, first set PxSCTL.DET to 0 */
787 scontrol = readl(port_mmio + PORT_SCR_CTL);
789 writel(scontrol, port_mmio + PORT_SCR_CTL);
791 /* then set PxCMD.SUD to 0 */
792 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
793 cmd &= ~PORT_CMD_SPIN_UP;
794 writel(cmd, port_mmio + PORT_CMD);
798 static void ahci_start_port(struct ata_port *ap)
800 /* enable FIS reception */
801 ahci_start_fis_rx(ap);
804 ahci_start_engine(ap);
807 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
812 rc = ahci_stop_engine(ap);
814 *emsg = "failed to stop engine";
818 /* disable FIS reception */
819 rc = ahci_stop_fis_rx(ap);
821 *emsg = "failed stop FIS RX";
828 static int ahci_reset_controller(struct ata_host *host)
830 struct pci_dev *pdev = to_pci_dev(host->dev);
831 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
834 /* global controller reset */
835 tmp = readl(mmio + HOST_CTL);
836 if ((tmp & HOST_RESET) == 0) {
837 writel(tmp | HOST_RESET, mmio + HOST_CTL);
838 readl(mmio + HOST_CTL); /* flush */
841 /* reset must complete within 1 second, or
842 * the hardware should be considered fried.
846 tmp = readl(mmio + HOST_CTL);
847 if (tmp & HOST_RESET) {
848 dev_printk(KERN_ERR, host->dev,
849 "controller reset failed (0x%x)\n", tmp);
853 /* turn on AHCI mode */
854 writel(HOST_AHCI_EN, mmio + HOST_CTL);
855 (void) readl(mmio + HOST_CTL); /* flush */
857 /* some registers might be cleared on reset. restore initial values */
858 ahci_restore_initial_config(host);
860 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
864 pci_read_config_word(pdev, 0x92, &tmp16);
866 pci_write_config_word(pdev, 0x92, tmp16);
872 static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
873 int port_no, void __iomem *mmio,
874 void __iomem *port_mmio)
876 const char *emsg = NULL;
880 /* make sure port is not active */
881 rc = ahci_deinit_port(ap, &emsg);
883 dev_printk(KERN_WARNING, &pdev->dev,
884 "%s (%d)\n", emsg, rc);
887 tmp = readl(port_mmio + PORT_SCR_ERR);
888 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
889 writel(tmp, port_mmio + PORT_SCR_ERR);
892 tmp = readl(port_mmio + PORT_IRQ_STAT);
893 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
895 writel(tmp, port_mmio + PORT_IRQ_STAT);
897 writel(1 << port_no, mmio + HOST_IRQ_STAT);
900 static void ahci_init_controller(struct ata_host *host)
902 struct pci_dev *pdev = to_pci_dev(host->dev);
903 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
905 void __iomem *port_mmio;
908 if (host->ports[0]->flags & AHCI_FLAG_MV_PATA) {
909 port_mmio = __ahci_port_base(host, 4);
911 writel(0, port_mmio + PORT_IRQ_MASK);
914 tmp = readl(port_mmio + PORT_IRQ_STAT);
915 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
917 writel(tmp, port_mmio + PORT_IRQ_STAT);
920 for (i = 0; i < host->n_ports; i++) {
921 struct ata_port *ap = host->ports[i];
923 port_mmio = ahci_port_base(ap);
924 if (ata_port_is_dummy(ap))
927 ahci_port_init(pdev, ap, i, mmio, port_mmio);
930 tmp = readl(mmio + HOST_CTL);
931 VPRINTK("HOST_CTL 0x%x\n", tmp);
932 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
933 tmp = readl(mmio + HOST_CTL);
934 VPRINTK("HOST_CTL 0x%x\n", tmp);
937 static unsigned int ahci_dev_classify(struct ata_port *ap)
939 void __iomem *port_mmio = ahci_port_base(ap);
940 struct ata_taskfile tf;
943 tmp = readl(port_mmio + PORT_SIG);
944 tf.lbah = (tmp >> 24) & 0xff;
945 tf.lbam = (tmp >> 16) & 0xff;
946 tf.lbal = (tmp >> 8) & 0xff;
947 tf.nsect = (tmp) & 0xff;
949 return ata_dev_classify(&tf);
952 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
955 dma_addr_t cmd_tbl_dma;
957 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
959 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
960 pp->cmd_slot[tag].status = 0;
961 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
962 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
965 static int ahci_kick_engine(struct ata_port *ap, int force_restart)
967 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
968 struct ahci_host_priv *hpriv = ap->host->private_data;
972 /* do we need to kick the port? */
973 busy = ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ);
974 if (!busy && !force_restart)
978 rc = ahci_stop_engine(ap);
982 /* need to do CLO? */
988 if (!(hpriv->cap & HOST_CAP_CLO)) {
994 tmp = readl(port_mmio + PORT_CMD);
996 writel(tmp, port_mmio + PORT_CMD);
999 tmp = ata_wait_register(port_mmio + PORT_CMD,
1000 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1001 if (tmp & PORT_CMD_CLO)
1004 /* restart engine */
1006 ahci_start_engine(ap);
1010 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1011 struct ata_taskfile *tf, int is_cmd, u16 flags,
1012 unsigned long timeout_msec)
1014 const u32 cmd_fis_len = 5; /* five dwords */
1015 struct ahci_port_priv *pp = ap->private_data;
1016 void __iomem *port_mmio = ahci_port_base(ap);
1017 u8 *fis = pp->cmd_tbl;
1020 /* prep the command */
1021 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1022 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1025 writel(1, port_mmio + PORT_CMD_ISSUE);
1028 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
1031 ahci_kick_engine(ap, 1);
1035 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1040 static int ahci_do_softreset(struct ata_port *ap, unsigned int *class,
1041 int pmp, unsigned long deadline)
1043 const char *reason = NULL;
1044 unsigned long now, msecs;
1045 struct ata_taskfile tf;
1050 if (ata_port_offline(ap)) {
1051 DPRINTK("PHY reports no device\n");
1052 *class = ATA_DEV_NONE;
1056 /* prepare for SRST (AHCI-1.1 10.4.1) */
1057 rc = ahci_kick_engine(ap, 1);
1059 ata_port_printk(ap, KERN_WARNING,
1060 "failed to reset engine (errno=%d)", rc);
1062 ata_tf_init(ap->device, &tf);
1064 /* issue the first D2H Register FIS */
1067 if (time_after(now, deadline))
1068 msecs = jiffies_to_msecs(deadline - now);
1071 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1072 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1074 reason = "1st FIS failed";
1078 /* spec says at least 5us, but be generous and sleep for 1ms */
1081 /* issue the second D2H Register FIS */
1082 tf.ctl &= ~ATA_SRST;
1083 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1085 /* spec mandates ">= 2ms" before checking status.
1086 * We wait 150ms, because that was the magic delay used for
1087 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
1088 * between when the ATA command register is written, and then
1089 * status is checked. Because waiting for "a while" before
1090 * checking status is fine, post SRST, we perform this magic
1091 * delay here as well.
1095 rc = ata_wait_ready(ap, deadline);
1096 /* link occupied, -ENODEV too is an error */
1098 reason = "device not ready";
1101 *class = ahci_dev_classify(ap);
1103 DPRINTK("EXIT, class=%u\n", *class);
1107 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
1111 static int ahci_softreset(struct ata_port *ap, unsigned int *class,
1112 unsigned long deadline)
1114 return ahci_do_softreset(ap, class, 0, deadline);
1117 static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
1118 unsigned long deadline)
1120 struct ahci_port_priv *pp = ap->private_data;
1121 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1122 struct ata_taskfile tf;
1127 ahci_stop_engine(ap);
1129 /* clear D2H reception area to properly wait for D2H FIS */
1130 ata_tf_init(ap->device, &tf);
1132 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1134 rc = sata_std_hardreset(ap, class, deadline);
1136 ahci_start_engine(ap);
1138 if (rc == 0 && ata_port_online(ap))
1139 *class = ahci_dev_classify(ap);
1140 if (*class == ATA_DEV_UNKNOWN)
1141 *class = ATA_DEV_NONE;
1143 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1147 static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class,
1148 unsigned long deadline)
1155 ahci_stop_engine(ap);
1157 rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context),
1160 /* vt8251 needs SError cleared for the port to operate */
1161 ahci_scr_read(ap, SCR_ERROR, &serror);
1162 ahci_scr_write(ap, SCR_ERROR, serror);
1164 ahci_start_engine(ap);
1166 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1168 /* vt8251 doesn't clear BSY on signature FIS reception,
1169 * request follow-up softreset.
1171 return rc ?: -EAGAIN;
1174 static void ahci_postreset(struct ata_port *ap, unsigned int *class)
1176 void __iomem *port_mmio = ahci_port_base(ap);
1179 ata_std_postreset(ap, class);
1181 /* Make sure port's ATAPI bit is set appropriately */
1182 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1183 if (*class == ATA_DEV_ATAPI)
1184 new_tmp |= PORT_CMD_ATAPI;
1186 new_tmp &= ~PORT_CMD_ATAPI;
1187 if (new_tmp != tmp) {
1188 writel(new_tmp, port_mmio + PORT_CMD);
1189 readl(port_mmio + PORT_CMD); /* flush */
1193 static u8 ahci_check_status(struct ata_port *ap)
1195 void __iomem *mmio = ap->ioaddr.cmd_addr;
1197 return readl(mmio + PORT_TFDATA) & 0xFF;
1200 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
1202 struct ahci_port_priv *pp = ap->private_data;
1203 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1205 ata_tf_from_fis(d2h_fis, tf);
1208 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1210 struct scatterlist *sg;
1211 struct ahci_sg *ahci_sg;
1212 unsigned int n_sg = 0;
1217 * Next, the S/G list.
1219 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1220 ata_for_each_sg(sg, qc) {
1221 dma_addr_t addr = sg_dma_address(sg);
1222 u32 sg_len = sg_dma_len(sg);
1224 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
1225 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1226 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
1235 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1237 struct ata_port *ap = qc->ap;
1238 struct ahci_port_priv *pp = ap->private_data;
1239 int is_atapi = is_atapi_taskfile(&qc->tf);
1242 const u32 cmd_fis_len = 5; /* five dwords */
1243 unsigned int n_elem;
1246 * Fill in command table information. First, the header,
1247 * a SATA Register - Host to Device command FIS.
1249 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1251 ata_tf_to_fis(&qc->tf, 0, 1, cmd_tbl);
1253 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1254 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1258 if (qc->flags & ATA_QCFLAG_DMAMAP)
1259 n_elem = ahci_fill_sg(qc, cmd_tbl);
1262 * Fill in command slot information.
1264 opts = cmd_fis_len | n_elem << 16;
1265 if (qc->tf.flags & ATA_TFLAG_WRITE)
1266 opts |= AHCI_CMD_WRITE;
1268 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1270 ahci_fill_cmd_slot(pp, qc->tag, opts);
1273 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1275 struct ahci_port_priv *pp = ap->private_data;
1276 struct ata_eh_info *ehi = &ap->eh_info;
1277 unsigned int err_mask = 0, action = 0;
1278 struct ata_queued_cmd *qc;
1281 ata_ehi_clear_desc(ehi);
1283 /* AHCI needs SError cleared; otherwise, it might lock up */
1284 ahci_scr_read(ap, SCR_ERROR, &serror);
1285 ahci_scr_write(ap, SCR_ERROR, serror);
1287 /* analyze @irq_stat */
1288 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1290 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1291 if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
1292 irq_stat &= ~PORT_IRQ_IF_ERR;
1294 if (irq_stat & PORT_IRQ_TF_ERR) {
1295 err_mask |= AC_ERR_DEV;
1296 if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
1297 serror &= ~SERR_INTERNAL;
1300 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1301 err_mask |= AC_ERR_HOST_BUS;
1302 action |= ATA_EH_SOFTRESET;
1305 if (irq_stat & PORT_IRQ_IF_ERR) {
1306 err_mask |= AC_ERR_ATA_BUS;
1307 action |= ATA_EH_SOFTRESET;
1308 ata_ehi_push_desc(ehi, "interface fatal error");
1311 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1312 ata_ehi_hotplugged(ehi);
1313 ata_ehi_push_desc(ehi, "%s", irq_stat & PORT_IRQ_CONNECT ?
1314 "connection status changed" : "PHY RDY changed");
1317 if (irq_stat & PORT_IRQ_UNK_FIS) {
1318 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1320 err_mask |= AC_ERR_HSM;
1321 action |= ATA_EH_SOFTRESET;
1322 ata_ehi_push_desc(ehi, "unknown FIS %08x %08x %08x %08x",
1323 unk[0], unk[1], unk[2], unk[3]);
1326 /* okay, let's hand over to EH */
1327 ehi->serror |= serror;
1328 ehi->action |= action;
1330 qc = ata_qc_from_tag(ap, ap->active_tag);
1332 qc->err_mask |= err_mask;
1334 ehi->err_mask |= err_mask;
1336 if (irq_stat & PORT_IRQ_FREEZE)
1337 ata_port_freeze(ap);
1342 static void ahci_port_intr(struct ata_port *ap)
1344 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1345 struct ata_eh_info *ehi = &ap->eh_info;
1346 struct ahci_port_priv *pp = ap->private_data;
1347 u32 status, qc_active;
1348 int rc, known_irq = 0;
1350 status = readl(port_mmio + PORT_IRQ_STAT);
1351 writel(status, port_mmio + PORT_IRQ_STAT);
1353 if (unlikely(status & PORT_IRQ_ERROR)) {
1354 ahci_error_intr(ap, status);
1359 qc_active = readl(port_mmio + PORT_SCR_ACT);
1361 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1363 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1367 ehi->err_mask |= AC_ERR_HSM;
1368 ehi->action |= ATA_EH_SOFTRESET;
1369 ata_port_freeze(ap);
1373 /* hmmm... a spurious interupt */
1375 /* if !NCQ, ignore. No modern ATA device has broken HSM
1376 * implementation for non-NCQ commands.
1381 if (status & PORT_IRQ_D2H_REG_FIS) {
1382 if (!pp->ncq_saw_d2h)
1383 ata_port_printk(ap, KERN_INFO,
1384 "D2H reg with I during NCQ, "
1385 "this message won't be printed again\n");
1386 pp->ncq_saw_d2h = 1;
1390 if (status & PORT_IRQ_DMAS_FIS) {
1391 if (!pp->ncq_saw_dmas)
1392 ata_port_printk(ap, KERN_INFO,
1393 "DMAS FIS during NCQ, "
1394 "this message won't be printed again\n");
1395 pp->ncq_saw_dmas = 1;
1399 if (status & PORT_IRQ_SDB_FIS) {
1400 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1402 if (le32_to_cpu(f[1])) {
1403 /* SDB FIS containing spurious completions
1404 * might be dangerous, whine and fail commands
1405 * with HSM violation. EH will turn off NCQ
1406 * after several such failures.
1408 ata_ehi_push_desc(ehi,
1409 "spurious completions during NCQ "
1410 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1411 readl(port_mmio + PORT_CMD_ISSUE),
1412 readl(port_mmio + PORT_SCR_ACT),
1413 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1414 ehi->err_mask |= AC_ERR_HSM;
1415 ehi->action |= ATA_EH_SOFTRESET;
1416 ata_port_freeze(ap);
1418 if (!pp->ncq_saw_sdb)
1419 ata_port_printk(ap, KERN_INFO,
1420 "spurious SDB FIS %08x:%08x during NCQ, "
1421 "this message won't be printed again\n",
1422 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1423 pp->ncq_saw_sdb = 1;
1429 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1430 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1431 status, ap->active_tag, ap->sactive);
1434 static void ahci_irq_clear(struct ata_port *ap)
1439 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1441 struct ata_host *host = dev_instance;
1442 struct ahci_host_priv *hpriv;
1443 unsigned int i, handled = 0;
1445 u32 irq_stat, irq_ack = 0;
1449 hpriv = host->private_data;
1450 mmio = host->iomap[AHCI_PCI_BAR];
1452 /* sigh. 0xffffffff is a valid return from h/w */
1453 irq_stat = readl(mmio + HOST_IRQ_STAT);
1454 irq_stat &= hpriv->port_map;
1458 spin_lock(&host->lock);
1460 for (i = 0; i < host->n_ports; i++) {
1461 struct ata_port *ap;
1463 if (!(irq_stat & (1 << i)))
1466 ap = host->ports[i];
1469 VPRINTK("port %u\n", i);
1471 VPRINTK("port %u (no irq)\n", i);
1472 if (ata_ratelimit())
1473 dev_printk(KERN_WARNING, host->dev,
1474 "interrupt on disabled port %u\n", i);
1477 irq_ack |= (1 << i);
1481 writel(irq_ack, mmio + HOST_IRQ_STAT);
1485 spin_unlock(&host->lock);
1489 return IRQ_RETVAL(handled);
1492 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1494 struct ata_port *ap = qc->ap;
1495 void __iomem *port_mmio = ahci_port_base(ap);
1497 if (qc->tf.protocol == ATA_PROT_NCQ)
1498 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1499 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1500 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1505 static void ahci_freeze(struct ata_port *ap)
1507 void __iomem *port_mmio = ahci_port_base(ap);
1510 writel(0, port_mmio + PORT_IRQ_MASK);
1513 static void ahci_thaw(struct ata_port *ap)
1515 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1516 void __iomem *port_mmio = ahci_port_base(ap);
1520 tmp = readl(port_mmio + PORT_IRQ_STAT);
1521 writel(tmp, port_mmio + PORT_IRQ_STAT);
1522 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1524 /* turn IRQ back on */
1525 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1528 static void ahci_error_handler(struct ata_port *ap)
1530 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1531 /* restart engine */
1532 ahci_stop_engine(ap);
1533 ahci_start_engine(ap);
1536 /* perform recovery */
1537 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
1541 static void ahci_vt8251_error_handler(struct ata_port *ap)
1543 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1544 /* restart engine */
1545 ahci_stop_engine(ap);
1546 ahci_start_engine(ap);
1549 /* perform recovery */
1550 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1554 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1556 struct ata_port *ap = qc->ap;
1558 /* make DMA engine forget about the failed command */
1559 if (qc->flags & ATA_QCFLAG_FAILED)
1560 ahci_kick_engine(ap, 1);
1563 static int ahci_port_resume(struct ata_port *ap)
1566 ahci_start_port(ap);
1572 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1574 const char *emsg = NULL;
1577 rc = ahci_deinit_port(ap, &emsg);
1579 ahci_power_down(ap);
1581 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1582 ahci_start_port(ap);
1588 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1590 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1591 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1594 if (mesg.event == PM_EVENT_SUSPEND) {
1595 /* AHCI spec rev1.1 section 8.3.3:
1596 * Software must disable interrupts prior to requesting a
1597 * transition of the HBA to D3 state.
1599 ctl = readl(mmio + HOST_CTL);
1600 ctl &= ~HOST_IRQ_EN;
1601 writel(ctl, mmio + HOST_CTL);
1602 readl(mmio + HOST_CTL); /* flush */
1605 return ata_pci_device_suspend(pdev, mesg);
1608 static int ahci_pci_device_resume(struct pci_dev *pdev)
1610 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1613 rc = ata_pci_device_do_resume(pdev);
1617 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1618 rc = ahci_reset_controller(host);
1622 ahci_init_controller(host);
1625 ata_host_resume(host);
1631 static int ahci_port_start(struct ata_port *ap)
1633 struct device *dev = ap->host->dev;
1634 struct ahci_port_priv *pp;
1639 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1643 rc = ata_pad_alloc(ap, dev);
1647 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1651 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1654 * First item in chunk of DMA memory: 32-slot command table,
1655 * 32 bytes each in size
1658 pp->cmd_slot_dma = mem_dma;
1660 mem += AHCI_CMD_SLOT_SZ;
1661 mem_dma += AHCI_CMD_SLOT_SZ;
1664 * Second item: Received-FIS area
1667 pp->rx_fis_dma = mem_dma;
1669 mem += AHCI_RX_FIS_SZ;
1670 mem_dma += AHCI_RX_FIS_SZ;
1673 * Third item: data area for storing a single command
1674 * and its scatter-gather table
1677 pp->cmd_tbl_dma = mem_dma;
1679 ap->private_data = pp;
1681 /* engage engines, captain */
1682 return ahci_port_resume(ap);
1685 static void ahci_port_stop(struct ata_port *ap)
1687 const char *emsg = NULL;
1690 /* de-initialize port */
1691 rc = ahci_deinit_port(ap, &emsg);
1693 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1696 static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
1701 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1702 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1704 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1706 dev_printk(KERN_ERR, &pdev->dev,
1707 "64-bit DMA enable failed\n");
1712 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1714 dev_printk(KERN_ERR, &pdev->dev,
1715 "32-bit DMA enable failed\n");
1718 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1720 dev_printk(KERN_ERR, &pdev->dev,
1721 "32-bit consistent DMA enable failed\n");
1728 static void ahci_print_info(struct ata_host *host)
1730 struct ahci_host_priv *hpriv = host->private_data;
1731 struct pci_dev *pdev = to_pci_dev(host->dev);
1732 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1733 u32 vers, cap, impl, speed;
1734 const char *speed_s;
1738 vers = readl(mmio + HOST_VERSION);
1740 impl = hpriv->port_map;
1742 speed = (cap >> 20) & 0xf;
1745 else if (speed == 2)
1750 pci_read_config_word(pdev, 0x0a, &cc);
1751 if (cc == PCI_CLASS_STORAGE_IDE)
1753 else if (cc == PCI_CLASS_STORAGE_SATA)
1755 else if (cc == PCI_CLASS_STORAGE_RAID)
1760 dev_printk(KERN_INFO, &pdev->dev,
1761 "AHCI %02x%02x.%02x%02x "
1762 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1765 (vers >> 24) & 0xff,
1766 (vers >> 16) & 0xff,
1770 ((cap >> 8) & 0x1f) + 1,
1776 dev_printk(KERN_INFO, &pdev->dev,
1782 cap & (1 << 31) ? "64bit " : "",
1783 cap & (1 << 30) ? "ncq " : "",
1784 cap & (1 << 29) ? "sntf " : "",
1785 cap & (1 << 28) ? "ilck " : "",
1786 cap & (1 << 27) ? "stag " : "",
1787 cap & (1 << 26) ? "pm " : "",
1788 cap & (1 << 25) ? "led " : "",
1790 cap & (1 << 24) ? "clo " : "",
1791 cap & (1 << 19) ? "nz " : "",
1792 cap & (1 << 18) ? "only " : "",
1793 cap & (1 << 17) ? "pmp " : "",
1794 cap & (1 << 15) ? "pio " : "",
1795 cap & (1 << 14) ? "slum " : "",
1796 cap & (1 << 13) ? "part " : ""
1800 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1802 static int printed_version;
1803 struct ata_port_info pi = ahci_port_info[ent->driver_data];
1804 const struct ata_port_info *ppi[] = { &pi, NULL };
1805 struct device *dev = &pdev->dev;
1806 struct ahci_host_priv *hpriv;
1807 struct ata_host *host;
1812 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1814 if (!printed_version++)
1815 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1817 /* acquire resources */
1818 rc = pcim_enable_device(pdev);
1822 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
1824 pcim_pin_device(pdev);
1828 if ((pi.flags & AHCI_FLAG_NO_MSI) || pci_enable_msi(pdev))
1831 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1835 /* save initial config */
1836 ahci_save_initial_config(pdev, &pi, hpriv);
1839 if (hpriv->cap & HOST_CAP_NCQ)
1840 pi.flags |= ATA_FLAG_NCQ;
1842 host = ata_host_alloc_pinfo(&pdev->dev, ppi, fls(hpriv->port_map));
1845 host->iomap = pcim_iomap_table(pdev);
1846 host->private_data = hpriv;
1848 for (i = 0; i < host->n_ports; i++) {
1849 struct ata_port *ap = host->ports[i];
1850 void __iomem *port_mmio = ahci_port_base(ap);
1852 /* standard SATA port setup */
1853 if (hpriv->port_map & (1 << i))
1854 ap->ioaddr.cmd_addr = port_mmio;
1856 /* disabled/not-implemented port */
1858 ap->ops = &ata_dummy_port_ops;
1861 /* initialize adapter */
1862 rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
1866 rc = ahci_reset_controller(host);
1870 ahci_init_controller(host);
1871 ahci_print_info(host);
1873 pci_set_master(pdev);
1874 return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
1878 static int __init ahci_init(void)
1880 return pci_register_driver(&ahci_pci_driver);
1883 static void __exit ahci_exit(void)
1885 pci_unregister_driver(&ahci_pci_driver);
1889 MODULE_AUTHOR("Jeff Garzik");
1890 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1891 MODULE_LICENSE("GPL");
1892 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1893 MODULE_VERSION(DRV_VERSION);
1895 module_init(ahci_init);
1896 module_exit(ahci_exit);